ehhh

.gitignore

@@ -1,3 +1,4 @@
 .vscode
 **/*.o
+**/Manifest.toml
 bazel-*

Project.toml

@@ -0,0 +1,4 @@
+name = "AoC2023"
+uuid = "6a329b9a-879f-4671-b49f-bf1b928a466a"
+authors = ["all authors"]
+version = "0.1.0"

README.md

@@ -40,3 +40,16 @@ AoC2023/
 - the input files should be named as `<day>_<name>.txt`, the content should be the input of the day without any dangling empty lines at the end
 - the solutions files should be named exactly as corresponding input file, the content should be exactly one or two lines (depending on if you solved both parts)
 - the `src/<lang>/<day>_<optional name>.<ext>` should matched the double-digit day number convention. The `<lang>` should match what appears in [`runtests.jl`](https://github.com/Moelf/AoC2023/blob/main/runtests.jl#L18-L28)
+
+## Note for Julia
+Each `<day>_julia.jl` script should use a `main()` and `@__FILE__` pattern similar to:
+```julia
+function main(path)
+    println("hello world")
+    println("solution 2")
+end
+
+(abspath(PROGRAM_FILE) == @__FILE__) && main(ARGS[1])
+```
+
+this way we can put each script int a `DayN` module and compile only once per day.

runtests.jl

@@ -1,4 +1,5 @@
 using Test
+using AoC2023
 
 const ALL_LANGUAGES = isempty(ARGS) ? readdir("src") : ARGS
 const INPUTS = readdir("./inputs")
@@ -22,7 +23,13 @@ function run_solution(source_path, input_path, ::Val{:cpp})
 end
 
 function run_solution(source_path, input_path, ::Val{:julia})
-    return readlines(`julia $source_path $input_path`)
+    original_stdout = stdout
+    rd, wr = redirect_stdout()
+    AoC2023.DAY_MODULES[source_path].main(input_path)
+    close(wr)
+    redirect_stdout(original_stdout)
+    result = readlines(rd)
+    return result
 end
 
 function run_solution(source_path, input_path, ::Val{:python})

src/AoC2023.jl

@@ -0,0 +1,12 @@
+module AoC2023
+
+const DAY_MODULES = Dict{String, Module}()
+function __init__()
+    files = readdir(joinpath(@__DIR__, "julia"); join=true)
+    for path in files
+        m = get!(DAY_MODULES, path, Module())
+        Base.include(m, path)
+    end
+end
+
+end

src/julia/00_test.jl

@@ -1,2 +1,6 @@
-println("hello world")
-println("solution 2")
+function main(path)
+    println("hello world")
+    println("solution 2")
+end
+
+(abspath(PROGRAM_FILE) == @__FILE__) && main(ARGS[1])

src/julia/01_bauerc_moelf.jl

@@ -1,19 +1,14 @@
-const INPUT_PATH = ARGS[1]
-
 # Part I
 function getnumber(line)
     i = findfirst(isdigit, line)
     j = findlast(isdigit, line)
     return parse(Int, string(line[i], line[j]))
 end
 
-function part1()
-    lines = readlines(INPUT_PATH)
-    println(sum(getnumber, lines))
-end
+part1(lines) = sum(getnumber, lines)
 
-part1() # Answer: 55123
 
+# Part II
 const lookup = Dict(
     "one" => 1,
     "two" => 2,
@@ -28,7 +23,6 @@ const lookup = Dict(
 
 const RE = Regex("$(join(keys(lookup), '|'))|\\d")
 
-# Part II
 function get_num_from_string(str)
     dig = tryparse(Int, str)
     !isnothing(dig) && return dig
@@ -44,9 +38,12 @@ function getnumber_part2(line)
     return num_first * 10 + num_last
 end
 
-function part2()
-    lines = readlines(INPUT_PATH)
-    println(sum(getnumber_part2, lines))
+part2(lines) = sum(getnumber_part2, lines)
+
+function main(path)
+    lines = readlines(path)
+    println(part1(lines))
+    println(part2(lines))
 end
 
-part2() # Answer: 55260
+(abspath(PROGRAM_FILE) == @__FILE__) && main(ARGS[1])

src/julia/02_moelf.jl

@@ -1,6 +1,3 @@
-const INPUT_PATH = ARGS[1]
-const ALL_LINES = readlines(INPUT_PATH)
-
 function color_dict(a::RegexMatch)
     num, color = a.captures
     Dict(color => parse(Int, num))
@@ -18,10 +15,15 @@ function part1_pred(line)
     return dict["red"] <= 12 && dict["green"] <= 13 && dict["blue"] <= 14
 end
 
-p1 = sum(findall(part1_pred, ALL_LINES))
-println(p1)
 
 # Part II
 part2(line) = line |> line_max |> values |> prod
-p2 = sum(part2, ALL_LINES)
-println(p2)
+
+function main(path)
+    lines = readlines(path)
+    p1 = sum(findall(part1_pred, lines))
+    println(p1)
+    println(sum(part2, lines))
+end
+
+(abspath(PROGRAM_FILE) == @__FILE__) && main(ARGS[1])

src/julia/03_moelf.jl

@@ -41,14 +41,17 @@ function seek_and_accumulate(schematics; seeder, reducer)
     return s
 end
 
-const SCHEMATICS = stack(readlines(ARGS[1]); dims=1)
 
 # Part 1
 issymbol(c) = !isdigit(c) && c != '.'
-p1 = seek_and_accumulate(SCHEMATICS; seeder = issymbol, reducer = sum)
-println(p1)
 
 # Part 2
 p2_reducer(nums) = length(nums) == 2 ? prod(nums) : 0
-p2 = seek_and_accumulate(SCHEMATICS; seeder = ==('*'), reducer = p2_reducer)
-println(p2)
+
+function main(path)
+    SCHEMATICS = stack(readlines(path); dims=1)
+    println(seek_and_accumulate(SCHEMATICS; seeder = issymbol, reducer = sum))
+    println(seek_and_accumulate(SCHEMATICS; seeder = ==('*'), reducer = p2_reducer))
+end
+
+(abspath(PROGRAM_FILE) == @__FILE__) && main(ARGS[1])